Title: Fantazy Tech
Link: https://www.curseforge.com/minecraft/modpacks/fantazy-tech-expert-mode
Desc: Super Fun Hardcore 1.12.2 Modpack with ~240 mods. It has IE, TConstruct, Mekanism and AE2. All recipes are harder and more expensive but there is automation for everything. Overall a GREAT pack if your looking for something more difficult!
MC Version: 1.12.2